Utility Regulator Northern Ireland.. Approval by Concerned Regulatory Authorities on all Asynchronously Connected TSO's Proposal for Common Settlement Rules for Intended Exchanges of Energy Between Synchronous Areas as a Result of the Frequency Containment Process and of Ramping Restrictions in Accordance with the Article 50(4) of Commission Regulation (EU) 2017/2195 of 23 November 2017 Establishing a Guideline on Electricity Balancing.. Belfast : Northern Ireland Authority for Utility Regulation, 2020. http://access.bl.uk/ark:/81055/vdc_100181330787.0x000001